Knight Rider LED

void setup() {
  // put your setup code here, to run once:
pinMode(5,OUTPUT);
pinMode(6,OUTPUT);
pinMode(7,OUTPUT);
pinMode(8,OUTPUT);
pinMode(9,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
int t=200;//int is intiger(numerical value)
digitalWrite(5,HIGH);
delay(t);//t=200 t is a delay time
digitalWrite(5,LOW);

digitalWrite(6,HIGH);
delay(t);//t=200 t is a delay time
digitalWrite(6,LOW);

digitalWrite(7,HIGH);
delay(t);//t=200 t is a delay time
digitalWrite(7,LOW);

digitalWrite(8,HIGH);
delay(t);//t=200 t is a delay time
digitalWrite(8,LOW);

digitalWrite(9,HIGH);
delay(t);//t=200 t is a delay time
digitalWrite(9,LOW);
//PREVIOURS PIN

digitalWrite(8,HIGH);
delay(t);//t=200 t is a delay time
digitalWrite(8,LOW);

digitalWrite(7,HIGH);
delay(t);//t=200 t is a delay time
digitalWrite(7,LOW);

digitalWrite(6,HIGH);
delay(t);//t=200 t is a delay time
digitalWrite(6,LOW);// Now back to up
}